/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    stm32f1xx_hal_timebase_tim.c
  * @brief   HAL time base based on the hardware TIM.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        htim7;
/* Private function prototypes -----------------------------------------------*/
void TIM7_IRQHandler(void);
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM7 as a time base source.
  *         The time source is configured  to have 1ms time base with a dedicated
  *         Tick interrupt priority.
  * @note   This function is called  automatically at the beginning of program after
  *         reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
  * @param  TickPriority: Tick interrupt priority.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
    RCC_ClkInitTypeDef    clkconfig;
    uint32_t              uwTimclock, uwAPB1Prescaler = 0U;

    uint32_t              uwPrescalerValue = 0U;
    uint32_t              pFLatency;
    HAL_StatusTypeDef     status = HAL_OK;

    /* Enable TIM7 clock */
    __HAL_RCC_TIM7_CLK_ENABLE();

    /* Get clock configuration */
    HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);

    /* Get APB1 prescaler */
    uwAPB1Prescaler = clkconfig.APB1CLKDivider;
    /* Compute TIM7 clock */
    if(uwAPB1Prescaler == RCC_HCLK_DIV1)
    {
        uwTimclock = HAL_RCC_GetPCLK1Freq();
    }
    else
    {
        uwTimclock = 2UL * HAL_RCC_GetPCLK1Freq();
    }

    /* Compute the prescaler value to have TIM7 counter clock equal to 1MHz */
    uwPrescalerValue = (uint32_t)((uwTimclock / 1000000U) - 1U);

    /* Initialize TIM7 */
    htim7.Instance = TIM7;

    /* Initialize TIMx peripheral as follow:

    + Period = [(TIM7CLK/1000) - 1]. to have a (1/1000) s time base.
    + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
    + ClockDivision = 0
    + Counter direction = Up
    */
    htim7.Init.Period = (1000000U / 1000U) - 1U;
    htim7.Init.Prescaler = uwPrescalerValue;
    htim7.Init.ClockDivision = 0;
    htim7.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim7.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

    status = HAL_TIM_Base_Init(&htim7);
    if(status == HAL_OK)
    {
        /* Start the TIM time Base generation in interrupt mode */
        status = HAL_TIM_Base_Start_IT(&htim7);
        if(status == HAL_OK)
        {
            /* Enable the TIM7 global Interrupt */
            HAL_NVIC_EnableIRQ(TIM7_IRQn);
            /* Configure the SysTick IRQ priority */
            if(TickPriority < (1UL << __NVIC_PRIO_BITS))
            {
                /* Configure the TIM IRQ priority */
                HAL_NVIC_SetPriority(TIM7_IRQn, TickPriority, 0U);
                uwTickPrio = TickPriority;
            }
            else
            {
                status = HAL_ERROR;
            }
        }
    }

    /* Return function status */
    return status;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM7 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
    /* Disable TIM7 update Interrupt */
    __HAL_TIM_DISABLE_IT(&htim7, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM7 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
    /* Enable TIM7 Update interrupt */
    __HAL_TIM_ENABLE_IT(&htim7, TIM_IT_UPDATE);
}

